Improvement in combined dividers, knife, and screw-driver



A NAWADNY; 7 Combined Dividers, Knife, and Screw-Driver.

N0. 215,2232. Patented May 13, 1879.

WITNESSES. I INVEHTD-F UNITED STATES PATENT OFFICE.

ALBERT NAWADNY, OF NEW ORLEANS, LOUISIANA.

IMPROVEMENT IN COMBINED DIVIDERS, KNIFE, AND SCREW-DRIVER.

Specification forming part of Letters Patent No. 215,282, dated May 13,1879 application filed January 28, 1879.

use of mechanics, inasmuch as it comprises several very useful andnecessary tools, all of which are connected together bya single pin in amanner which will readily admiti of an adjustment whereby any one of themany devices may be brought into position for actual use.

On the drawings, Figures -1 and 2 represent the invention in differentpositions. Fig. 3 is a view of the inner side of the solid leg of thedividers; Fig. 4, the locking side of the knife and screw-driver andFig. 5, the pin and nut whereby the several parts are held together.

The tools comprised in this device are a screw-driver, a, knife b,square 0, rule 0?, and a pair of dividers, E. One leg, f, of the latteris slotted, as at g, in order that it may be adjusted for wheelwright aswell as ordinary uses. The nut H is provided with a short stem, i,through which a hole is bored and tapped to receive the threaded stemofa thumb-screw, K. The stem 2' is turned so as to neatly fit in eyes:10 a" that are drilled in the solid leg h and in the knife andscrew-driver portion L, the said pieces h L being held thereon, ineither a parallel or cross position, by means of the ridges or keys m mand grooves n n, the for mer constructed on the knife and screw-driverportion, and the latter on the inner side of the solid leg, as shown.

A certain portion of the nut-stem z'is out on opposite sides, so as toproduce flat surfaces,

*upon which is fitted thelegf, the slotin which permits of its beingshortened, whenever desired.

The solid leg h of the dividers is stamped with a scale or rule, as atd, and the square is formed by one edge of the aforesaid leg and theback of the knife, the latter being secured for the said purpose atright angles to the former, as shown at c, in Fig. 2. y

The different tools are brought into position for use by loosening thethumb-screw until the ridges m m have been raised clear of the groovesin the leg h, when the central section, L, is turned in the desireddirection, and the aforesaid screw again tightened.

Having described my invention, what I claim as new, and desre to secureby Letters Patent, is-

In combination with thumb -screw K and nut H, having cylindrical stem1', provided with a prismatic screw-tapped extension, a blade havinggrooves n 72, arranged at right angles to each other, another blade, L,having longitudinal ridges m m, and a third blade or leg, f, havinglongitudinal slot g, the said parts being so constructed and arranged asto serve for a combined knife, screw-driver, square, compass, andwheelwrights compass, all substantially as set forth.

In testimony whereof I have herenn to signed my name.

ALBERT NAVVADN Y.

In presence of- J. O. HUBBELL, P. J. FINNEY.

